base/memory/memory_pressure_monitor.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/memory/memory_pressure_monitor.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace base {
  10 namespace {
  11
  12 MemoryPressureMonitor* g_monitor = nullptr;
  13
  14 }  // namespace
  15
  16 MemoryPressureMonitor::MemoryPressureMonitor() {
  17   DCHECK(!g_monitor);
  18   g_monitor = this;
  19 }
  20
  21 MemoryPressureMonitor::~MemoryPressureMonitor() {
  22   DCHECK(g_monitor);
  23   g_monitor = nullptr;
  24 }
  25
  26 // static
  27 MemoryPressureMonitor* MemoryPressureMonitor::Get() {
  28   return g_monitor;
  29 }
  30
  31 }  // namespace base